/Engine/Source/Runtime/MovieScene/Public/MovieSceneSequencePlayer.h
Custom serialization method so that all the properties in this struct are in sync with the server. Without this, we could sometimes get half of the properties up-to-date, and half of the properties left to old values. This is especially problematic when LastKnownPosition updates, but LastKnownStatus is left as "Stopped".
bool NetSerialize ( [FArchive](API\Runtime\Core\Serialization\FArchive) & Ar, [UPackageMap](API\Runtime\CoreUObject\UObject\UPackageMap) * PackageMap, bool & bOutSuccess )